<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        .container {
            display: flex;
            justify-content: space-evenly;
            /*flex-direction: row-reverse;*/
        }

        .box {
            display: none;
        }

        .box {
            width: 150px;
            height: 150px;
            line-height: 150px;
            text-align: center;
            border: 1px solid blue;
        }

        .box:nth-child(1) {
            order: 100;
        }

        .box:nth-child(2) {
            order: 200;
        }

        .box:nth-child(3) {
            order: 150;
        }
    </style>
</head>
<body>
<div class="container">
    <div class="box">1</div>
    <div class="box">2</div>
    <div class="box">3</div>
</div>
</body>
</html>